Company facts
- Industry
- Pharmaceutical Preparations
- Headquarters
- Waltham, Massachusetts
- Most recent report
- 8-K, filed Oct 13, 2026
- Incorporated
- Delaware
- Filings on record
- 189 filings
- On EDGAR
- CIK 1953926
- Fiscal year ends
- December
- Filer status
- Emerging growth company
Financials 8
News 8 of 20
Prospectuses and Registrations 8 of 19
- S-3ASR Automatic shelf registration Sep 11, 2026
- S-8 Registration statement for an employee plan Sep 11, 2026
- 424B5 Prospectus supplement for an offering Mar 30, 2026
- 424B5 Prospectus supplement for an offering Mar 30, 2026
- FWP Free writing prospectus Mar 27, 2026
- FWP Free writing prospectus Mar 27, 2026
- 424B5 Prospectus supplement for an offering Mar 26, 2026
- 424B5 Prospectus supplement for an offering Mar 26, 2026
Proxies 4
Ownership 8 of 110
- SCHEDULE 13G Large holder reported a passive stake Sep 8, 2026
- 3 Insider reported their initial holding Sep 8, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Sep 8, 2026
- 4 Insider reported a trade Sep 2, 2026
- 3 Insider reported their initial holding Sep 2, 2026
- SCHEDULE 13D/A Large holder reported an active stake, amended Aug 19, 2026
- 144 Notice of a proposed sale of restricted stock Aug 19, 2026
- SCHEDULE 13D/A Large holder reported an active stake, amended Aug 17, 2026
Other 8 of 28
- ARS Annual report sent to shareholders Mar 16, 2026
- 424B7 Jan 28, 2026
- ARS Annual report sent to shareholders Apr 28, 2025
- SEC STAFF LETTER Sep 12, 2024
- EFFECT Notice that a registration became effective Sep 12, 2024
- S-1MEF Sep 12, 2024
- CERT Exchange certified a listing Sep 12, 2024
- 8-A12B Registration of a security for exchange listing Sep 10, 2024
Everything here comes from Zenas BioPharma, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.